Ordinary strong solution of `HCl, HNO_3` and `H_2 SO_4` contains roughly.

Options

A. `1//5, 2//3` and `3//3` fractions of pure acid and water respectively
B. `2//3, 1//5` and `3//3` fractions of pure acid and water respectively
C. `2//3,3//3` and `1//5` fractions of pure acid and water respectively
D. None

Explanation

To solve the question regarding the composition of ordinary strong solutions of HCl, HNO3, and H2SO4, we will analyze the percentages of pure acid in each solution and calculate the fractions of pure acid and water.

### Step-by-Step Solution:

1. **Identify the Concentration of Each Acid:**
- For Hydrochloric Acid (HCl), the concentration is approximately 20%.
- For Nitric Acid (HNO3), the concentration is approximately 68%.
- For Sulfuric Acid (H2SO4), the concentration is approximately 98%.

2. **Convert Percentages to Fractions:**
- For HCl:
\[ \text{Fraction of HCl} = \frac{20}{100} = \frac{1}{5} \]
- For HNO3:
\[ \text{Fraction of HNO3} = \frac{68}{100} = \frac{68}{100} \approx \frac{2}{3} \]
- For H2SO4:
\[ \text{Fraction of H2SO4} = \frac{98}{100} = \frac{98}{100} \approx \frac{3}{3} = 1 \]

3. **Summarize the Fractions:**
- The fractions of pure acid in the ordinary strong solution are:
- HCl: \( \frac{1}{5} \)
- HNO3: \( \frac{2}{3} \)
- H2SO4: \( 1 \)

4. **Calculate the Total Fractions:**
- The total fraction of pure acids can be represented as:
\[ \text{Total} = \frac{1}{5} + \frac{2}{3} + 1 \]
- To add these fractions, we need a common denominator. The least common multiple of 5 and 3 is 15.
- Converting each fraction:
- \( \frac{1}{5} = \frac{3}{15} \)
- \( \frac{2}{3} = \frac{10}{15} \)
- \( 1 = \frac{15}{15} \)
- Adding these fractions:
\[ \frac{3}{15} + \frac{10}{15} + \frac{15}{15} = \frac{28}{15} \]

5. **Determine the Fraction of Water:**
- The total fraction of the solution is 1 (or 100%). Therefore, the fraction of water can be calculated as:
\[ \text{Fraction of Water} = 1 - \text{Total Fraction of Acids} \]
- Since the total fraction of acids is greater than 1, it indicates that the solution is concentrated and the remaining part is water.

6. **Conclusion:**
- The ordinary strong solution of HCl, HNO3, and H2SO4 contains roughly the fractions of pure acid and water as \( \frac{1}{5}, \frac{2}{3}, \text{ and } 1 \) respectively.